Khanacademy

Khan Academy is completely free — no subscriptions, no paywalls, and no premium tiers. It operates as a registered nonprofit organization funded by donations and grants, which means the entire library of lessons, practice problems, and teacher tools is available to anyone at no cost.

Sal Khan founded Khan Academy after he began tutoring his cousin Nadia remotely using hand-drawn YouTube videos in the mid-2000s. The positive response from viewers around the world convinced him to leave his career in finance and build it into a full nonprofit education platform, which officially launched in 2008.

Yes, Khan Academy is the official free SAT practice partner of the College Board, the organization that writes and administers the SAT. Their personalized practice program links directly to a student's PSAT results to create a tailored study plan, and it is widely considered one of the most effective no-cost SAT prep resources available.

Khanmigo is Khan Academy's AI-powered tutor and teaching assistant, built to guide students through problems using Socratic questioning rather than just handing over answers. Unlike passive video watching, Khanmigo interacts with the student in real time, helping them work through reasoning steps and also offering tools for teachers to create lesson plans.

Yes, Khan Academy has a dedicated teacher dashboard that lets educators assign specific content, monitor individual student progress, and identify skill gaps across their class. Teachers can see exactly which concepts a student is struggling with, which is designed to help them give more targeted instruction rather than one-size-fits-all lessons.

The Breakthrough Junior Challenge is an annual global competition where students create short videos explaining a complex idea in science or mathematics to a general audience. Khan Academy has been a prominent supporter and promotional partner of the challenge, which aligns directly with their mission of making rigorous education accessible and engaging for everyone.

Khan Academy awards mastery certificates and badges when students complete courses and demonstrate proficiency across a subject area. These are not accredited academic credentials recognized by colleges or employers, but they do serve as a personal record of skill mastery within the platform and can reinforce a learner's progress.

Khan Academy covers a broad range of subjects including biology, chemistry, physics, history, economics, personal finance, grammar, computer science, and art history, among others. Their recent content even tackles real-world adult topics like why doctor visits cost so much and what full insurance coverage actually means, showing the range goes well beyond school math.

Khan Academy is designed for learners of all ages, and a significant portion of their audience is adults aged 25 and older. Their content spans everything from foundational arithmetic to college-level subjects and personal finance topics, making it useful for adults who want to fill knowledge gaps, change careers, or simply keep learning.

Khan Academy's YouTube channel has grown to nearly 10 million subscribers, placing it firmly in the Mega tier and among the largest dedicated education channels on the platform globally. Their reach extends well beyond the United States, with strong audiences in India, the United Kingdom, and Canada.